Apparatus for stretching and drying skins, leather, and other materials



March 15, 1927. E E KORNITZ. 1,620,821

APPARATUS FOR STRETCHING AND DRYING SKINS, LEATHER, AND OTHER MATERIALS Filed Feb. 8. 1925 Patented Mar. 15, 1921,

umrao STATES PATENT OFFICE.

A. IBEOHS'IEIN,

swarm a. 303mm, or mwauxnn, wrsconsm, assrenon or one-ms no cm 01' MILWAUKEE, WISCONSIN.

um-roe non sranrcnme AND name sxnrs, Learn, m or marnarars.

Application rum February a, 1928. serial no. 817,800.

This invention relates to certain new and:

useful improvements in apparatus for stretching and drying skins, leather and pther materials and is an improvement over 6 the structure illustrated in Letters Patent No. 1,438,355, issued December 12, 1922, to Carl A. Bechstein and Ewald E; Kornitz, and refers more particularly to the construction of the frame and the means for procuring relative movement between the'sections thereof.

It is a general object of this IIIVGIItIOII tO simplify the means for procuring relative movement between the frame sections/and 1 which will S -I -IIIIl-f movement on the partof the frame sections".

It is another object of this invention to provide means for moving the mam frame sections toward and awayfrom' each other and means independent thereof and 0 enable upon actuation of the mentions means to procure corresponding movement of the other frame sections.

- Another object of this mvent1on resides "in the provision of togglemeans connecting the various frame sections .for. procuring relative movement therebetween whereby simplicity of design together with maximum strength is procured.

80 A. further object of this invention resides in the provision of a supporting frame member having a pair of main parallel frames 'slidably mounted ward and away from each other and a pair 85 of auxiliary frame sections carried one by each main frame and adapted for longitudinal movement therein.

And a still further-object of this invention resides in [he provision of an 1mw proved manner'of attaching a foraminous plate or cover to the frame sections in order to facilitate the read attachment thereto of the material to be ried.

With the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims it being understood that such changes in the precise embodimentof the hereindisclosed invention may be made as come within the scope of the claims.

so far devised for the rectan therein for movement to-.

In the accompan ng drawings, I have illustrated one-comp ete example of' the physical embodiment of my invention constructed according to the best mode I have practical application of the prmciples thereo and in which: Figure 1 is a side elevational view of my improved expansible frame, a skin or other material being illustrated in dotted lines as attached thereto, parts of the foraminous covering of several of the sections being broken away in order to illustrate the details of construction;

Fi ure 2 is a sectional view taken transverse y through Figure 1 on the plane of the line 2--2, and

Figure 3 is an enlar view, partly in section an partly in elevatron, said view being taken through Figure 1 on the plane of the line'3-3.

Referr ng now more particularly to the accompanying drawing inwhich like numerals designate like several views, the numeral 5 edfragmentary lar supporting frame constructs of tubing or other material and adapted to be ortably suspended from an overhead tree 6 by trolleys 7 to facilitate transgortation of the ap aratus to and from rymg rooms or 0t er places. The so porting frame has mounted therein for si ewise movement a pair of parallel main frame members 8, each consisting of the frame-work or side bars 9 of tubing or the like. The frames 8 have end brackets 9" carrying rollers 10 which track on the upper and lower bars 11 of the frame 5 to thus permit unrestricted movement of the frame members toward and common plane,

Each frame member 8 has an intermediate division bar 12 dividing the same. into an upper and lower section. the lower section thereof being covered with a foraminous or perforated covering 13 preferably in the form of sheet material provided with a plurality of openings 14. The covering is attached to the frame 8 by having its end secured to channel bars 15 which in turn straddle the side bars of the frame and are secured thereto by suitable fastenings 16. lhis construction places the surface to which parts throughout the designates a the material is attached on a higher plane than that of the mechanism: for actuating 'the spreading mechanism, to be later de-..

An auxiliary section 17 is longitudinally slidably mounted between-the si e bars of the upper half or tion of each main frame bybearingmembe 18 carried by the aux iliary sections and main frame side-bars. Each auxihary section is provided with a covering 13 similar 1 to that of the lower portion-of the main es. I In operation, the skin, leather or other material 19 to be stretched and driedissecured to the apparatus in substant'ally an even, taut condition by fastening members 20 hooked ends adapted to be inserted in the" a ertures 14 and .the main frames and aux 'ary sections then expanded to complete the stretching operation.- It is essential that this relative movement between the parts or various frame sections, be uniform,

and in the present embodiment, it is accom- Y plislied by a rod 21, the ends of which are I threaded, as at 22, and passed throu h nuts 23 centrally secured in the upper an lower bars 11 of the frame 5, whereby rotation of I the rod 22," by a crank (not shown) inserted ol 1;its keyed, end 24, will procure longitudmal movement thereof.

gles or links .32,

Longitudinal movement of rod 21 imparts a movement between the main frames toward or away from each other as pairs of toggle members or links 25 are pivotally secured, as at 26, to collars-27 'freel rotatably secured on the shaft 21' by with their lower ends pivotall at 29, to brackets30 carried side bars of the frames '8.

secured, as

With this construction it will be obvious that with the parts in'the positions illustrated in Fi e 1, a movement .of rod' 21 in the direct on of the arrow 31 spreads the frames 8 and a movement of the rod in a reverse direction contracts the main frames. This movement of frames'8 is transmitted to the auxiliary sections 18 by pairs of togsecured in pairs by a common' pivot 33 to a" rod 34 and havmg their outer ends. secured to the adjacent end bar of the adjacent auxiliary section 13 and to the end bar 12 of the adjacent section 8.

As illustrated in the drawings two pairs of tog le links connect e'ach auxlliary section with t e adjacent bar 12 and they are so arranged that a vmovement apart of the frames 8 will spread the toggles and a reverse movement of the frames 8 contract the slidably engaging the.

"adapted to maintain ed collars 28 fr y the inner adjacent frame and -the frames,

frame and in as'lida scribed, comprising supporting means, a

plurality of frame members, meansfor attaching work ,to the frame members, means connecting the frame members with fthesupporting meanswhereby they are permitted movement toward and away from each other with their work enga ing surfaces in a'substantially'common p necting the frame procure relative movement 'therebetween.

J apparatus of the character descrlbed, comprising pairs of frame members, the'framemembers mounted for movement toward and away from each other and each pair being mounted for movement toward and away from each other, means operable to move the pairs of frame members toward and away from each other, and means independent of the first named means and operable upon movement of the pairs of frame members toward or away from each other to impart a corresponding movement between the frame members of each pair.

3. apparatus of the character described, comprisin means connecting t' e frames for movement toward and away from each other and the same in a common lane, an auxiliary section carried by each -rame, means adapted to maintain each auxiliary section in a common plane with its ad'acent frame and in a slidable relation-- ship ongitudinally' toward and away from its frame, toggle means connecting the frames and the auxiliary sections with their ames, and means for actuatin the toggles o "effect relative movement frames and auxiliary sections.

4. An apparatus of the character described, comprisin two a parallel frames, means connecting t e frames for movement toward and away adapted to maintain the same in a common lane, an auxiliary section carried by each ame, means adapted to maintain. each auxiliary section in a common plane with its ship longitudinally toward and away from its frame, a rod slidably mounted between toggles connected with the'rod and the frames and adapted upon sliding movement of the rod .to spread the frames, and means 0 erable upon spreading movement of the rames to the auxiliary sections.

v 5. An apparatusof the character described,

comprising two parallel frames, means connecting the frames for movement toward and away from each other and adapted to maintain the same in a common plane, an auxiliary section carried by e'ac frame, means adapted to maintain each auxiliary section in a common lane with its adiacent le relationship ongitwo parallel frames,

et'ween the in, a slidable relation-.

produce spreading of ane, and means conmembers and operable to of each pair beingfrom each other and tudinally toward and away from its frame, a rod shdably mounted between the frames, toggles connected with the rod and the frames and adapted upon sliding movement of the rod to spread the frames, a bar extending across the frames between them and the auxiliary sections, and pairs of toggles carried by the bar and connecting the auxiliary sections with their frames, whereby spreading of the frames by said rod and the toggles carried thereby eifects a spreading of the auxiliary sections through the medium of the bar and the toggles carried thereby.

6. An apparatus of the character de scribed, comprising a rectangular frame including end and side bars, a pair of parallel frames including side and end bars, means carried b the end bars of the parallel frames and sli abl engaging the end bars of the rectangular frame to retain the parallel frames in a common plane and permit their movement toward and away from each other, a covering for adjacent ends of the parallel frames, an auxiliary section slidably mounted in the other end of each parallel frame and capable of movement toward and away from the covered end of its parallel frame, and means for procuring relative movement between the parallel frames and the auxiliary sections.

7. An apparatus of the character described, comprising a frame member including side bar members, channel members secured to the side bars with their surface projected beyond the frame member, and a perforated coverin secured to the channel members and provi 'ng a covering for the frame member.

8. An apparatus of the character described, comprising a pair of frame members, means for attaching work to the frame members, means mounting the frame members for movement toward and awa from each other with their work engaglng surfaces in a substantially common plane, a rod mounted between the frame members and adapted to be longitudinally shifted, toggle links, means connecting the toggle links with the rod and the frame members, whereby shifting of the rod imparts movement to the frame members, and means for longitudinally shifting, the rod.

In testimony whereof I afiix my signature. I

EWALD E. KORNITZ. 

